Educational Test Bench for Attitude Control of 1U Cubesats

Author(s):  
A Bonilla ◽  
D González ◽  
G. Voltas ◽  
J. Gago
Drones ◽  
2020 ◽  
Vol 4 (4) ◽  
pp. 71
Author(s):  
Luz M. Sanchez-Rivera ◽  
Rogelio Lozano ◽  
Alfredo Arias-Montano

Hybrid Unmanned Aerial Vehicles (H-UAVs) are currently a very interesting field of research in the modern scientific community due to their ability to perform Vertical Take-Off and Landing (VTOL) and Conventional Take-Off and Landing (CTOL). This paper focuses on the Dual Tilt-wing UAV, a vehicle capable of performing both flight modes (VTOL and CTOL). The UAV complete dynamic model is obtained using the Newton–Euler formulation, which includes aerodynamic effects, as the drag and lift forces of the wings, which are a function of airstream generated by the rotors, the cruise speed, tilt-wing angle and angle of attack. The airstream velocity generated by the rotors is studied in a test bench. The projected area on the UAV wing that is affected by the airstream generated by the rotors is specified and 3D aerodynamic analysis is performed for this region. In addition, aerodynamic coefficients of the UAV in VTOL mode are calculated by using Computational Fluid Dynamics method (CFD) and are embedded into the nonlinear dynamic model. To validate the complete dynamic model, PD controllers are adopted for altitude and attitude control of the vehicle in VTOL mode, the controllers are simulated and implemented in the vehicle for indoor and outdoor flight experiments.


2018 ◽  
Vol 16 (8) ◽  
pp. 2161-2167
Author(s):  
Everton Coelho de Medeiros ◽  
Willy Roger de Paula Mendonca ◽  
Everaldo de Barros ◽  
Mauro Hugo Mathias

2014 ◽  
Vol 59 (4) ◽  
pp. 1275-1281 ◽  
Author(s):  
R. Burdzik ◽  
T. Wegrzyn ◽  
Ł. Konieczny ◽  
A. Lisiecki

Abstract The paper presents results of research on influence of fatigue metal damage of the inner race of bearing on vibration in different frequencies. The active diagnostics experiments were conducted on application of vibroacoustics methods for technical condition monitoring. Provides an overview of materials and process analysis of rolling bearings wear. The bearing damage of the inner race have been simulating. The research was conducted on special research-educational test bench for vibration monitoring for rotaring machinery. For the identification of the symptoms of the defects in the vibration signal the analysis of time realization and frequency transformation of the vibration have been conducted. For the comparison of the vibration of good and damage bearings signals registered for different frequencies have been presented in form of spectrograms and RMS distributions.


2015 ◽  
Vol 19 (6) ◽  
pp. 473-483 ◽  
Author(s):  
Yun-sung Choi ◽  
Young-jin You ◽  
Jin-seok Jeong ◽  
Beom-soo Kang

2018 ◽  
Vol 11 (6) ◽  
pp. 326
Author(s):  
Nassima Khorchef ◽  
Abdellah Mokhtari ◽  
Abdelmadjid Boudjemai

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